<?php

namespace app\models;

use Yii;
use yii\base\Model;
use yii\data\ActiveDataProvider;
use app\models\ClassModel;

/**
 * ClassSearch represents the model behind the search form about `app\models\ClassModel`.
 */
class ClassSearch extends ClassModel
{
    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['id',  'semester',  'num'], 'integer'],
            [['type','year','stu_id', 'time', 'jieshu', 'course', 'teacher','name'], 'safe'],
        ];
    }

    /**
     * @inheritdoc
     */
    public function scenarios()
    {
        // bypass scenarios() implementation in the parent class
        return Model::scenarios();
    }

    /**
     * Creates data provider instance with search query applied
     *
     * @param array $params
     *
     * @return ActiveDataProvider
     */
    public function search($params)
    {
        $query = ClassModel::find();

        // add conditions that should always apply here

        $dataProvider = new ActiveDataProvider([
            'query' => $query,
        		'pagination' => [
        				'pageSize' => 1000,
        		],
        ]);

        $this->load($params);

        if (!$this->validate()) {
            // uncomment the following line if you do not want to return any records when validation fails
            // $query->where('0=1');
            return $dataProvider;
        }

        // grid filtering conditions
        $query->andFilterWhere([
            'id' => $this->id,         
            'semester' => $this->semester,
            'num' => $this->num,
        ]);

        $query->andFilterWhere(['like', 'stu_id', $this->stu_id])
            ->andFilterWhere(['like', 'jieshu', $this->jieshu])
            ->andFilterWhere(['like', 'course', $this->course])
            ->andFilterWhere(['like', 'teacher', $this->teacher])
            ->andFilterWhere(['like', 'name', $this->name])
            ->andFilterWhere(['like', 'year', $this->year])            
            ->andFilterWhere(['like', 'time', $this->time])
            ->andFilterWhere(['like', 'type', $this->type]);

        return $dataProvider;
    }
}
